[PATCH] add hook to generic irq code (free_irq)

[Chris Wedgwood]

This is needed because some architectures (well, presently only UML)
needs to be notified as things are freed.

Signed-off-by: cw@xxxxxxxx


I can't say I'm 100% happy about this, either the name or a somewhat
ugly hook that is called with a spinlock held but for lack of any
better suggestions...

Comments?

 include/asm-i386/hardirq.h   |    3 +++
 include/asm-ppc/hardirq.h    |    3 +++
 include/asm-ppc64/hardirq.h  |    3 +++
 include/asm-x86_64/hardirq.h |    4 ++++
 kernel/irq/manage.c          |    1 +
 5 files changed, 14 insertions(+)


diff -Nru a/include/asm-i386/hardirq.h b/include/asm-i386/hardirq.h
--- a/include/asm-i386/hardirq.h	2004-10-19 17:47:40 -07:00
+++ b/include/asm-i386/hardirq.h	2004-10-19 17:47:40 -07:00
@@ -16,4 +16,7 @@
 
 void ack_bad_irq(unsigned int irq);
 
+/* NOP */
+#define platform_free_irq_notify(i, d)
+
 #endif /* __ASM_HARDIRQ_H */
diff -Nru a/include/asm-ppc/hardirq.h b/include/asm-ppc/hardirq.h
--- a/include/asm-ppc/hardirq.h	2004-10-19 17:47:40 -07:00
+++ b/include/asm-ppc/hardirq.h	2004-10-19 17:47:40 -07:00
@@ -27,5 +27,8 @@
 	BUG();
 }
 
+/* NOP */
+#define platform_free_irq_notify(i, d)
+
 #endif /* __ASM_HARDIRQ_H */
 #endif /* __KERNEL__ */
diff -Nru a/include/asm-ppc64/hardirq.h b/include/asm-ppc64/hardirq.h
--- a/include/asm-ppc64/hardirq.h	2004-10-19 17:47:40 -07:00
+++ b/include/asm-ppc64/hardirq.h	2004-10-19 17:47:40 -07:00
@@ -25,4 +25,7 @@
 	BUG();
 }
 
+/* NOP */
+#define platform_free_irq_notify(i, d)
+
 #endif /* __ASM_HARDIRQ_H */
diff -Nru a/include/asm-x86_64/hardirq.h b/include/asm-x86_64/hardirq.h
--- a/include/asm-x86_64/hardirq.h	2004-10-19 17:47:40 -07:00
+++ b/include/asm-x86_64/hardirq.h	2004-10-19 17:47:40 -07:00
@@ -36,4 +36,8 @@
 #endif
 #endif
 }
+
+/* NOP */
+#define platform_irq_free_notify(i, d)
+
 #endif /* __ASM_HARDIRQ_H */
diff -Nru a/kernel/irq/manage.c b/kernel/irq/manage.c
--- a/kernel/irq/manage.c	2004-10-19 17:47:40 -07:00
+++ b/kernel/irq/manage.c	2004-10-19 17:47:40 -07:00
@@ -260,6 +260,7 @@
 				else
 					desc->handler->disable(irq);
 			}
+			platform_free_irq_notify(irq, dev_id);
 			spin_unlock_irqrestore(&desc->lock,flags);
 			unregister_handler_proc(irq, action);
 
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